【作者】 陆静娟； 杨辉； 郭兴忠； 张俊； 张瑞捷；

【Author】 Lu Jingjuan Guo Xingzhong Yang Hui Zhang Jun Zhang Ruijie (Center of Nano- science and Nanc-technology of Zhejiang University, Hangzhou 310027)

【机构】 浙江大学纳米科学与技术中心；

【摘要】 以甲基三甲氧基硅烷(MTMS)的水解缩聚产物作为主要成膜物质,正硅酸乙酯(TEOS)水解缩聚产物硅溶胶及异丙醇铝制备的勃姆石溶胶作为无机增强物,通过共缩聚反应在聚碳酸酯(PC)板表面制备硅铝胶改性甲基硅树脂耐磨薄膜;采用TG/DTA、 FTIR、UV-VIS、金相显微镜及铅笔硬度测试方法对薄膜的结构及性能进行表征。研究结果表明,甲基硅树脂、硅胶、铝胶通过共缩聚反应在PC板表面形成带有机基团的无机交联网络结构,基本骨架由Si-O-Si,Si-O-Al,Al-O-Al组成;添加铝胶后,提高了薄膜的耐热性能以及薄膜硬度;薄膜对PC片的可见光透过率有一定的增透作用;铝胶的掺杂使薄膜表面不平整。更多还原

【Abstract】 With the polycondensates of methyltrimethoxysilane(MTMS) as film forming materials, the boehmite sols (prepared by aluminium isopropoxide) and silica sols (hydrolysis products of Tetraethylorthosilicate (TEOS)) as Inorganic reinforcing materials, The abrasion-resistant film of methylsilicone modified by boehmite and silica sols on polycarbonate (PC) was prepared through the co-condensation reaction, and the properties and structure of the hybrid thin film were studied by TG/ DTA, FTIR, UV-VIS, metallographic microscope and pencil test. The results show that the cross-linked inorganic structure endcapped with organic groups on the PC forms by the co-condensation reaction between methylsilicone, boehmite and silica sols, whose base backbone is Si-O-Si, Si-O-AI, AI-O-AI network structure. With increasing of boehmite sols, the property of heat-resistance and hardness of film is improved. The hybrid film has a little influence on the transmtttance of light, whose chief role is reflection reduction. The addition of boehmite sols make the surface of film rough.更多还原